So, you have bought your favourite paper and hung it on the wall using a quality brand of wallpaper paste.
You allowed each length of wallpaper its proper soaking time after applying the paste, before hanging on the wall.
You met the edges of each length together with the next to create the best end result.
It looks fantastic.
The next day, when the wallpaper paste has dried, there are gaps of a couple of millimetres between each hung length! Oh, the horror!
Why does this happen?
If you hang wallpaper on unprepared walls or ceilings, the walls and ceilings will suck all the moisture out of the wallpaper and paste.
This causes the paper to shrink and results in the gap between hung lengths.
How can I prevent this from happening?
Prevention is very simple.
On everything except new plaster, so on previously painted or papered walls, an application of size is required.
Size is a runnier version of wallpaper paste which you can buy in sachets from all good DIY shops – it will be right next to the packets of wallpaper paste. As with wallpaper paste it does not cost much but in terms of how your wallpaper will look at the end of the project it’s priceless!
Mix the size powder with the appropriate amount of water and paste it onto the wall or ceiling you intend to paper.
Leave overnight to dry.
This will give you time to plan the wallpapering project ahead so don’t think of it as wasted time when all you want to do is get the job done.
On the contrary, consider the size time as THE most important part of the job.
Apply your paper, butting your edges against each other.
You will notice that with walls that have been sized, you are able to slip and slide your length of pasted wallpaper into position more easily.
Upon drying you will not have gaps between each hung length of paper. Unless you left a gap of course!
Job well done.